German newspaper Bild says the Bundesliga side are not impressed by the youngster and could decide to terminate his loan deal.
Moreno is currently on a one-year loan deal from Shakhtar Donetsk.
“It’s clear that things aren’t going as we expected when we signed Moreno. However, we’ve loaned him for one year. We’d have to speak with Shakhtar Donetsk first if we are to terminate his loan deal,” said technical director Klaus Allofs.